Mechanism for shaving cylindrical record tablets



Sept. 19, 1933. w. s. FRIDELL MECHANISM FOR SHAVING CYLINDRICAL RECORDTABLETS 2 sheets-sheet 1 Filed Feb. 5, 1932 57 Z6 J Z7 Pfg. 2

NVENTOR. ff/IIS .5'. f'l'deil.

A TTORNEY Sept. 19, 1933. w. s. FRIDELL MECHANISM FOR SHAVINGCYLINDRICAL RECORD TABLETS Filed Feb. 5, 1932 2 Sheets-Sheet 2 INVENTOR.Willis 5. Frz'dell.

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A TTORNEY Patented Sept. 19, 1933 PATET FFiCE vMCHANISM( FOR SHAVINGCYLINDRICAL RECORD TABLETS Willis S. Fridell, Washington, D. C.,assignor to Thomas A. Edison, Incorporated, West Orange, N. J., acorporation of New Jersey Application February 5,

14 Claims.

This invention relates to improvements in the mechanism for shavingcylindrical record tablets such, for example, as those used oncommercial phonographs.

In the conventional form of shaving machine for such record tablets, thepart carrying the knife, must be pressed down by the operator againstthe wax cylinder, a spring being interposed between the knife and thepoint at which pressure is applied to Jcarry it into engagement with thesurface of the cylinder. This pressure or tension must be maintaineduntil the knifebar is locked in position by separate levers and clampingmeans provided for the purpose.

My present improvement is directed to an improved form ofknife-supporting, setting, and locking mechanism, and it is thereforethe principal object of my invention to provide a' knifebar andcontrolling'mechanism therefor which is more automatic in its operationthan the designs now in use.

Another object of my improvement is to provide a mechanism which willobviateithe necessity for taking a second cut or a plurality of cutsacross the surface of the cylinder.

An ancillary object of my invention is to obtain a mechanism which willspeed up the operation of shaving of the record cylinders.

Other and further objects will appear to one skilled in this particularart, after reading the specication, in which:

Figure l is a top-plan View, on a reduced scale, of an entire cylindershaving machine, except that only onek end of the operating motor isshown.

Figure 2 is a side elevation of the machine shown in Figure 1,

Figure 3 is a right-hand end elevation of the machine shown in Figures land 2.

Figure 4 is a View, substantially Afull-size, of the knife-bar housingin approximately the same position which it occupies in Figure 3, andlooking at the same side shown in Figure 3, certain parts Nithin thehousing being shown in dotted lines, and the knife itself and chip-guardbeing removed. v

Figure 5 is a View of Figure 4 looking at the right-hand end.

Figure 6 is a section on the line 6-6 of Figure 5.

Figure 7 is a View of the bottom side of the knife-bar housing.

Figure 8 is a side elevation of avmovable knifebar support.

Figure 9l is a view of the left-hand end of Figure 8. l

` ing screw 13.

1932. serial No. 591,113

Figure 10 is a view of the right-hand end of Figure 8.

Figure l1 is a fragmentary central view on the line H-H of Figure 1,showing the automatic stop mechanism utilized in setting the knife-bar.n

Figure 12 is a fragmentary plan view looking down on the top of Figure11, certain of the parts being shown in dotted lines.

Figure 13 is a View showing the cylinder and position of the knife barand cutting tool just at the instant the cutting tool engages thecylinder and before the shaver arm is moved to the position shown inFigure 3. The View also shows the final position of the cutting tool asindicated in Figure 3. p

Figure 14 is an enlarged fragmentary view taken approximatelyon the line14-14 of Figure l1.

In the description which follows, the holder or conventional parts ofthe shaving mechanism will be referred to briefly, and only for thepurpose of making my improvements clearly understood.

1n the various views of the drawings, wherein like numbers refer tocorresponding parts, 1 is a frame preferably of metal, to which isattached a driving motor 2. rIhe rotor shaft is connected 'through auniversal joint 3 to a shaft 4 carried by a suitable support 5. Theshaft 4 also carries a cylindrical mandrel 6 for supporting the recordtablet '7.

The frame 1 also carries two bosses or pedestals 8 and 9, between whichis supported a rod 10 carrying the shaver arm l1 which is fastened to asleeve 12 by any satisfactory means as by clamp- The sleeve 12 alsocarries a flexible 90 arm 14 on the extremity of which is mounted aplate 15v having screw-threads cut therein for engagement with the feedscrew 16 supported between the bosses or pedestals 17 and 18. The feedscrew 16 is operated by a pulley 19 driven by 95 a belt 20 from -pulley21 on the shaft of the motor 2.

Below the mandrel 6, a rectangular opening 80 is provided in the frame 1for the passage of chips l resulting from the shaving operation.Adjacent ioo the rear of the opening 80, a rib 81 is provided across theframe 1 for the purpose of strengthening and stiifening the frame atthis point. The arm 11 rcarries a downwardly extending finger 54 adaptedto engage the rib 81 to limit the move- 105 ment of the arm 11 in onedirection as may be seen in Figure 3.

The shaver arm 11 is provided with a stop lug 22 which engages astraight edge 23 carried on the frame of the machine.

From the above brief description, it will be seen that when the shaverarm 11 is moved to the right on the support rod 10, and dropped down sothat the stop lug 22 engages the straight edge 23, the screw 15 willengage the thread of the feed screw 16, and when this is rotated by themotor 2, the shaver arm 11 will be carried toward the left, and theknife carried in the holder 24 will take a cut or shaving from the outersurface of the cylindrical record 7.

My improvements to the general mechanism of the machine will now bedescribed.

Mounted on the bracket 25 attached to the shaver arm 11, is arectangular-shaped housing 26 having a bent cover plate 27 adapted toclose one side and one end thereof, the short arm 28 of the coverclosing the end of the casing. Within the casing 26, are positioned twoV slideways 29 and 30. These V slide-ways are preferably bent up fromsheet metal, or they may be out from angle-shaped strips, The member 29has a saddle 31 attached at one end and a similarlyshaped saddle 32 atthe other end. The saddle 31 in provided with anotch 33 which is formedat an angle so as to provide a cam surface 34 to be engaged by a screw35 carried by the casing for the purpose to be hereinafter explained.The saddle 32 is provided with a pair of recesses 36, in each of whichis positioned a pair of springs 37, the purpose of which will bedirectly explained.

The slide-way member 30 has similar saddles 31', 32 which are notprovided with the cam surface or the recesses but are provided withscrew-threaded holes to receive the screws 38 and 39 for holding thecover 27 in place. The slide-way member 30 is fixed in position withinthe easing 26, while the slide-way member 29 is movable therein.

Between the movably-mounted slide-way member 29 andthe fixed slide-waymember 30, there is,` a sliding bar, hereinafter referred to as aknife-bar 40. The bar 40 is substantially square in cross-section and isprovided throughout its ylength with a cylindrical bore 41 adapted toslidably support a plunger 43. Positioned within the upper part of thebore 41, is a spring 42 adapted to rest on the end of the plunger 43. Tothe outer end of plunger 43 is attached a knifeholder 24 carrying aknife 45 preferably of sapphire. The knife-bar 40 and phunger 43 areheld together by set screw 44. The knife-bar 40 carries a pin 46, theend of which operates in a slot 47 in the cover plate 27. The pin 46 andslot 47 act to determine the extreme positions to which the knife may bemoved, in one of which they act to prevent the shaving of a cylinderbelow a predetermined minimum diameter.

On the side of the casing, opposite the cover 27, there is attached abracket 48 having ears which support a pivot pin 49. On the end of thepivot pin 49, there is mounted, by means of a screw 50, a lever arm 51which is adapted to engage a stop member 52 (see Figs. 1 and 2) for thepurpose to be directly explained.

The pivot pin 49 carries a secondary pin 53 which projects through aslot in the side of the casing 26 to a point just below the saddle 32 onthe slide-way 29, whereby, when the lever 51 is operated, the' slide-way29 is moved longitudinally.

The nger 54 of arm 11 is adapted to engage, under one condition ofoperation, an interference piece or stop member normally biased to aposition within a slot 82 in the rib 81 and comprising a latch 55fastened by a pivot pin 56 to a horizontal lug on a lever 57, whichextends downwardly through the opening in the frame and is in turnpivoted on the under side of the frame of the machine by a pivot screwor pin 58. The lever 57 is biased by a spring 59 against the frame,while the latch 55 is held against a stop pin 61 carried on the lever57, by a spring 62. Thus the interference piece or stop member iscapable of a compound motion for the purpose which will be made clear inthe description of the operation of the machine.

The machine is equipped with a compound lever arrangement comprising ahand-operated arm 63 acting through a link 64 and connecting rod 65,link 66, to the lever 67. The lever 67 has pivotally mounted thereon, ashoe 68 having a limited movement whereby it will self-align itself inengagement with the end 69 of the record cylinder when the lever 63 ispulled toward the operator, looking at Figure 2. When the lever 63 istoward the operator, the shoe 68' engages the end 69 of the recordcylinder and pushes it off the cylinder support member 6, but the recordcylinder is prevented from being thrown oil' the support, because thelever 63 is brought into its path before this can happen. The lever 63is provided with a leaf spring 63 to prevent breakage of the cylinder. Ihave thus provided a simple and eifective way of removing the recordcylinder from its support without injury thereto.

llt may be remarked in passing that the levers 79 and 71 carried on theslide-bar 72, are engaged by the member 14 at the limit of its travels,

for operating a switch mechanism 73 for con- 1f trolling the operationof the motor 2.

Coming now to the operation of the shaving mechanism, let it be assumedthat the shaver arm 11 is traveling to the left (see Fig. 1) and takinga cut on the record cylinder 7. As the 1 lever 5l, mounted on theknife-bar housing 26, engages the stop 52, the pin 53 is operated toengage the saddle 32 on the slide-Way 29, as has been explained. Thisraises the slide-way 29, which has been held in close engagement with 1the knife-bar 40, by reason of the cam surface 34, and the cooperatingscrew 35, together with Y the downward action of the springs 37. As soonas the slide-way 29 has been raised as above explained, its grip on theknife-bar 40 is broken 1 and the knife-bar 40, which has passed by theleft-hand end of the cylinder 7, drops down until the pin 46 engages thelower end of the slot 47. At the same time, the motor is stopped byreason of the switch mechanism previously explained. l

The knife is now ready to be reset to take another cut on the samecylinder if desired, or to shave another cylinder. This resetting isdone by the operator taking hold of the knob 74 and raising the sameuntil the nger 54 strikes the 1 rib 81 of the frame'l, or the knifeclears the cylinder, and then moving the shaving arm 11, with its sleevel2, to the right (see Fig. 1) on the rod 10. Presently the finger 54 onthe shaving arm il strikes the latch 55 which is rotated 1 against thetension of spring 62 until it strikes the edges of slot 82 in rib 81where it is held against further motion thereby preventing, for themoment, further movement to the right.

The operator then starts lowering the shaver arm 11, which act willbring the cutting tool 45 into contact with the surface of the cylinder7 about as lindicated in Figure 13. Further lowering of the shaver arm11 to the position shown in Figure 3, will cause the knife-bar 4o to be1 pushed inwardly within the casing against the tensionY of the spring42,and as the shaver arm l1 is lowered, the cutting tool will slide onits end surface on the cylinder as the knife-bar 4f) is pushed inwardlyuntil, when the stop lug 22 on the arm l1 engages thestraight edge 23,the cutting tool will be in about the position indicated by 76 in FigureI3, which is the normal cutting position of the tool. While the knife-fbar is being moved into resetting position as just described, theslide-way 29 is being urged downwardly by the springs 37 to itslower-most position, since the lever 5l hasV been moved away fromengagement with the stop 52. As theslidev way 29 moves downwardly, thepin`35 carried to clear the latch as indicated in Figure 11, so

that the spring 62 will cause the latch to return to its normal positionagainst the stop pin 61. In this position it presents the right handedge of its inner end portion to the finger 54 of the arm 11 which maynow be raised to disengage the feed nut. This movementl causes thefinger 54 to engage the latch 55 at the right-hand edge of its inneredge portion and since the latch is held against movement by reason ofits engagement with pin 61, further movement of the arm will force thelever 57 and latch 55 out of the way so that lthe arm 11 may be freelymoved to the right to the starting position. It is to be noted that thelatch 55 is so mounted as to offer 'little or no resistance to themovement of the finger 54 which readily pushes it out of the way whenthe shaver arm 1l is moving to the left to take the shaving out on thecylinder.

From the preceding description, it will be seen that all the operator isrequired to do is to raise the shaver arm 11 after the shaving cut hasbeen made, move it to the right until it engages the stop, drop theshaver arm 11 to the position shown in Figure 3, immediately raise it,and move the arm to the extreme right and drop it into said bar toreleasably lock the same againstv longitudinal movement in onedirection, said device being ineifective to lock said bar againstlongitudinal movement in the other direction.

2. In a record shaving machine, a knife bar, a support on which said baris mounted for longitudinal movement, and means comprising a membercarried by said support and automatically movable into locking relationwith said bar upon the application to the bar of force in one directionlengthwise thereof.

3. In a record shaving machine, a knife bar, a

support on which said bar is mounted for longitudinal movement, meanscomprising a member carried by said support and movable thereon intofrictional engagement with said bar, and means rendered operable uponthe application to the bar of force in one direction lengthwise .thereofto effect such engagement.

4. In a 'record shaving machine, a knife bar longitudinallyl movable toand from operative position with respe'ctto arecord mounted in themachine, and a member for locking said knife bar. against longitudinalmovement, said member being movable'to and from operative lockingposition and being biasedV to such position, the locking member when inoperative position being effective to hold said bar against longitudinalmovement in but one direction, said knife bar upon the applicaltion offorce thereto in the other direction of its longitudinal movementeffecting movement of said member to inoperative position.

5. In a record shaving machine, a rotatable record support, a carriage,said carriage and support being relatively movable transversely of saidsupport, a knife bar mounted on said carriage for movement toward andaway from said support, said knife bar being biased to one limit of suchmovement, means for locking said bar in .operative position with respectto a record mounted iny said machine, and means for releasing saidlocking means, said releasing means being automatically actuableuponcornpletion of and in response to the relative transverse movementof said carriage and support in one direction.

6. In a record shaving machine, a rotatable record support, a carriage,said carriage and support being relatively movabler transversely ofsaidsupport, a knife bar mounted onsaid carriage for movement toward andaway from said support, said knife bar being biased to the inner limitof such movement, means for locking said bar in operative position withrespect to a record mountedin said machine, and means for automaticallyreleasing said locking means upon completion of and in response to therelative transverse movement of said carriage and support in onedirection.

7. In a record shaving machine, a rotatable record support, a carriage,said carriage and support being relatively movable transversely of saidsupport, said carriage also being movable toward and away from the axisof said support, a knife bar mounted on said carriage for movementtowardand away from a record on said support, said bar being biased tothe inner limit of its said movement and being movable toward the otherlimit of such movement to operative position by engagement of its knifewith said record upon movement of said carriage toward the axis of saidsupport, and means for locking said bar in operative position.

8. In a record shaving machine, a rotatable record support, a carriage,said carriage and support being relatively movable transversely of saidsupport, said carriage also being movable toward and away from the axisof said support, and a knife bar mounted on said carriage for movementtoward and away from a recordv on said support, said bar being biased tothe inner limit of its said movement and being movable toward the otherlimit of such movement by camming engagement of its knife with saidyrecord upon movement of said carriage toward the axis of said support.

9. In a record shaving machine, a rotatable record support, a carriage,said carriage and support being relatively movable transversely of saidsupport, said carriage also being movable toward and'away from the axisof said support, a knife bar mounted on said carriage for movementtoward and away from a record on said support, said bar being biased tothe inner limit of its said `movement and being movable toward the otherlimit of such movement to operative position with respect to said recordby engagement of its knife with the record upon movement of saidcarriage toward the axis of said support, and releasable locking meansnormally effective to lock said bar against movement toward the recordsupport but which is ineffective to lock the same against movement awayfrom said support.

10. In a record shaving machine, a rotatable record support, a carriage,said carriage and support being relatively movable transversely of saidsupport, a knife bar mounted on said carriage for movement toward andaway from operative position with respect to a record on said support,said carriage also being movable to effect setting of the knife-bar inits said operative position, and means for preventing movement of saidcarriage to starting position before the knife-bar setting movementthereof.

11. In a record shaving machine, a rotatable record support, a carriage,said carriage and support being relatively movable transversely of saidsupport, a knife bar mounted on said carriage for movement toward andaway from operative position with respect to a record on said support,said carriage also being manipulative to effect setting of the knife-barin its said operative position, and means cooperative with said carriageand necessitating such manipulation of the carriage before the same ismoved to its starting position.

l2. In a record shaving machine, a rotatable record support, a carriage,said carriage and supportbeing relatively movable transversely of saidsupport, a knife bar mounted on said carriage for movement toward andaway from operative position with respect to a record on said support,said carriagerbeing movable toward and away from said support and whenpositioned away from said support being freely movable toward thestarting position, movement of said carriage toward said support beingeffective to move said knife bar to operative position with respect tosaid record, and a member located in the path of movement of saidcarriage transversely of the support, said carriage when in knife barsetting position being adapted to clear said member.

13. In apparatus of the class described, a rotatable support forcylindrical records, land means for ejecting a record from said supportcomprising a member which is movable into and out of the path Aofmovement of the record from said support, said member being moved intosaid path upon the operation of said means to eject said record.

14. In apparatus of the class described, arotatable support forcylindrical records, and means for ejecting a record from said supportcomprising a resilient bumper member which is movable as a result of theactuation of such means into and out of the path of movement of therecord from said support, said member being moved into said path onlyupon the operation of said means to eject said record.

WILLIS S. FRIDELL.

CERTIFCATE @F CRRECTON.

Patent No. 1,927,167. sepemeef es, 1933.

WILLES S. ERDELL It is hereby eei'ied hat error annesso in toe printedspeoiieetiens of the above numbered Datemi iequiring ooireeon as oiows:Page 2, Eine 24, for "in" read is; and line 5L for phonger" eed plunger;page 3, line H, eieim 8, strike out "smi" seeond ooeorrenoe; Eine i4-3?ater "movement" inserti the words to operative position; and line M6,ehe-i "sappen" insert the semina and words and means im' locking saidbei' in opeetive position; and imt he said Letters Patent should be readwith hese eorrections therein that the seme may conform to the record ofthe case in the Pafren ice.

Signed and seaied this 21st day of Novenlbef, An D. 1933.

F. M. Hopkins (Seal) Acting Commissioner of Patents.

